JP4480416B2 - Printer opening / closing mechanism - Google Patents

Description

  The present invention relates to an opening / closing mechanism of a printer, and more particularly to a mechanism for smoothly opening / closing and locking a printer main body and a main body cover side.

  A first prior art printer will be described. In this printer, the following structure is adopted in order to make it easy to open and close the cover with respect to the printer main body and to smoothly lock the cover to the printer main body. That is, long holes are formed on both sides of the cover, and a shaft is provided on the printer body. Both long holes are fitted on the shaft, and a clearance is provided between the long holes and the shaft.

  As a second conventional technique, a lock mechanism for an upper cover provided in a facsimile machine, an electrophotographic printer, or the like will be described (for example, see Patent Document 1).

  FIG. 7 is a schematic cross-sectional view of the main part viewed from the side surface side. FIG. 8 is a plan view of the main part shown with a part broken away.

  As shown in FIGS. 8A and 8B, the upper lid locking mechanism includes a pair of stoppers 32, 32 provided on the front surface 31a side of the apparatus frame 31, and a slide that is slidably fitted to the stoppers 32, 32. A pair of gears 34 and 34 fixed to the shaft 33 and the slide shaft 33 so as not to move in the axial direction and rotatable only in one direction, an operation lever 35 fixed to one end of the slide shaft 33, and an upper lid 41 are provided. When the upper lid 41 is closed, a pair of teeth 34a, 34a of the gears 34, 34 are pressed from the paper front side (front side) to the paper back side (direction side) of FIG. 8 to rotate the gears 34, 34. A hook 42, 42 and a pair of return springs 36, 36 for urging the gears 34, 34 in the direction of the arrow X 'are provided.

  Each of the gears 34 and 34 is configured to be rotatable only in one direction by incorporating a claw wheel or the like, for example. Further, the holes 32a and 32a of the stoppers 32 and 32 that fit into the slide shaft 33 are formed in a cross-sectional shape such as a square so that the stoppers 32 and 32 are not rotated by being driven by the gears 34 and 34.

  The operation of the locking mechanism of the upper lid 41 will be described with reference to FIGS. FIG. 8A shows a state where the upper lid 41 is locked, and FIG. 8B shows a state where the upper lid 41 is unlocked.

1. When locking the upper lid 41 (FIG. 8A)
(1) The upper lid 41 supported on the apparatus frame 31 by the fulcrum shaft 40 is rotated in the direction of arrow A in FIG.

  (2) Since the hooks 42 and 42 press the teeth 34a and 34a of the gears 34 and 34 located at the locking positions K and K by the rotation of the upper lid 41, the gears 34 and 34 are in the direction of arrow B. Rotate to.

  (3) When the upper lid 41 is completely closed, the hooks 42 and 42 are in a state of being sandwiched by the tooth portions 34a and 34a of the gears 34 and 34, as shown in FIG.

  (4) Since the gears 34 and 34 do not rotate in the reverse direction, the upper lid 41 cannot be returned in the direction of the arrow A ′ and is locked in the closed state.

2. When unlocking the top lid 41 (FIG. 8B)
(1) Press the operation lever 35 in the direction of arrow X in FIG.

  (2) Since the slide shaft 33 moves in the direction of the arrow X, the gears 34, 34 fixed to the slide shaft 33 compress the return springs 36, 36 from the lock positions K, K, and the lock release position. Move to L, L and stop.

  (3) As the gears 34 and 34 move, the hooks 42 and 42 of the upper lid 41 that are locked to the tooth portions 34a and 34a are released.

  (4) When the hooks 42 and 42 are released from the lock of the tooth portions 34a and 34a, the upper lid 41 is opened in the direction of the arrow A 'by the action of a spring (not shown).

Microfilm of actual application No. 62-106776 (No. 64-11758) (page 6, line 13 to page 9, line 9, FIGS. 1 and 2)

  In the first prior art printer, the entire cover is allowed to move relative to the printer main body by the clearance dimension, which hinders the rotational operation of the cover. In addition, the cover is difficult to be smoothly locked to the printer body.

  The lock mechanism for the upper lid of the second prior art printer or the like is complicated in structure, has a large number of parts, and is expensive.

  Therefore, the present invention improves the disadvantages of the above-mentioned conventional techniques, and the body cover side of the platen body can be smoothly opened and closed, and the structure is simple, the number of parts is small, and the cost is reduced. However, it is intended to provide an inexpensive printer opening and closing mechanism.

  The present invention employs the following means in order to solve the above problems.

1. A printer main body, and a main body cover side rotatably attached to the printer main body. The printer main body includes a printer base, a printer portion attached to the printer base, and a lock / release member attached to the printer base. has the door, the body cover side, an opening and closing arm mounted rotatably on said printer base, and the platen unit mounting plate that is provided separately from the said opening and closing arm, mounted on the platen unit mounting plate A platen portion to be attached to the opening / closing arm, and the platen portion mounting plate is movable in a direction in which the platen portion can be engaged with the lock / release member. attached to, when the body cover side is closed with respect to the printer main body, the platen unit is the lock By releasing member engage, the opening and closing mechanism of the printer in which the body cover side is locked to the printer body.

  2. 2. The printer opening / closing mechanism according to claim 1, wherein a shaft fixed to the platen portion mounting plate is fitted in a long hole formed in the opening / closing arm so that the platen portion mounting plate is movably attached to the opening / closing arm. .

  3. 3. The printer opening and closing mechanism according to 2 above, wherein the long hole is a track-like hole.

  4). 2. The printer opening and closing mechanism according to claim 1, wherein the lock and release member is formed in a substantially L shape and has a lock recess.

  5. 5. The printer opening and closing mechanism according to claim 4, wherein the main body cover side is locked to the printer main body when a shaft provided in the platen portion is engaged with the lock recess.

  6). 6. The printer opening and closing mechanism according to 5, wherein a power transmission gear is fixed to a shaft provided in the platen portion.

  As is apparent from the description of the specification, the present invention has the following effects.

  1. Since only the platen part mounting plate is movably attached to the opening / closing arm, the platen part easily engages with the lock / release member, so that the main body cover side rotates smoothly and is locked to the printer main body.

  2. Since the main body cover side includes an opening / closing arm, a platen part mounting plate, a platen part, and a cover, the structure is simple, the number of parts is small, and the cost is low.

  An opening / closing mechanism of a printer according to an embodiment of the present invention will be described.

  A first embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view of the printer main body with the main body cover side opened, FIG. 2 is a perspective view of the main body cover side closed with respect to the printer main body, and FIG. 3 is a perspective view of FIG. 2 with the cover removed. 4 is an enlarged side view of the opening / closing arm, the platen part mounting plate, and the movable shaft of the platen part mounting plate in the vicinity of the movable shaft, FIG. 5 is a front view of the main body cover side closed with respect to the printer main body, and FIG. Sectional views taken along line AA in FIG. 5 are shown.

  First, the structure of the printer main body 1 according to the first embodiment will be described with reference to FIG. The printer body 1 includes a printer base (printer mounting plate) 2, a printer unit 3, a pair of motors 4, 5, gears (not shown) fixed to the output shafts of the motors 4, 5, Cables 6 and 7 and a substantially L-shaped lock / release lever 8 installed near the right side of the printer unit 3 are provided. The printer unit 3, the motors 4 and 5, the electric cables 6 and 7, and the lock / release lever 8 are attached to the printer base 2.

  Next, the structure of the main body cover side 11 will be described with reference to FIGS. The main body cover side 11 is slightly movable by a movable shaft 14 to a symmetrical opening / closing arm 13 attached to the printer base 2 by a rotary shaft 12 and a long hole 13a (details will be described later) of the opening / closing arm 13. A platen part mounting plate 15 to be attached, a cover 16 to be attached to the opening and closing arm 13, a pair of support parts 15a and 15b provided on both left and right sides of the platen part mounting plate 15, and a support part 15a and 15b that are rotatable. The platen portion 17 to be attached, the gears 18 and 19 fixed to the respective shafts 17a and 17b on the left and right sides of the platen portion 17, the intermediate gears 20 and 21 meshing with the gears 18 and 19, and the rolls. A pair of side guides 16a and 16b for guiding the left and right sides of the sheet, and a pair of upper surface guides 16c and 16d for regulating the position of the upper part of the sheet. To. The intermediate gears 20 and 21 are attached to the platen portion attachment plate 15, and the side guides 16 a and 16 b and the upper surface guides 16 c and 16 d are provided on the cover 16.

  As shown in FIG. 3 (B), the long hole 13a of the opening / closing arm 13 is formed in a track shape for track and field (a shape obtained by connecting semicircles to both short sides of a rectangle) The movable shaft 14 fixed to the platen portion mounting plate 15 fits in the long hole 13a with a clearance.

  The opening and closing of the main body cover side 11 with respect to the printer main body 1 will be described.

  First, an operation of rotating the main body cover side 11 from the opened state shown in FIG. 1 to the closed state shown in FIGS. 2, 5, and 6 with respect to the printer main body 1 will be described. The main body cover side 11 is rotated so as to approach the printer main body 1. Then, since the opening / closing arm 13 rotates about the rotation shaft 12, the shaft 17 b of the platen portion 17 engages with the lock recess 8 a of the lock / release lever 8. The lock / release lever 8 is always urged upward in FIG. 1 by a spring (not shown). Therefore, the main body cover side 11 is locked to the printer main body 1 in the closed state shown in FIGS. 2, 5, and 6. At this time, since the movable shaft 14 fixed to the platen portion mounting plate 15 is fitted with a clearance in the elongated hole 13a of the opening and closing arm 13, the shaft 17b of the platen portion 17 is locked to the lock recess 8a of the lock / release lever 8. Even if the position is slightly deviated, the lock is smoothly engaged with the lock recess 8a.

  When the motors 4 and 5 rotate, the rotational force is transmitted to the platen unit 17 via the gears fixed to the output shafts of the motors 4 and 5, the intermediate gears 18 and 19, and the gears 20 and 21. The When the platen unit 17 rotates, the paper stored in the printer is transported and printed as it passes between the printer unit 3 and the platen unit 17 as shown in FIG. After that, it is discharged outside the printer.

  Next, an operation for releasing the lock on the printer main body 1 on the main body cover side 11 will be described. When the lock / release lever 8 is pushed downward in FIG. 1 by fingers, the lock recess 8 a is separated from the shaft 17 b of the platen portion 17. Therefore, the main body cover side 11 can rotate from a closed state with respect to the printer main body 1 shown in FIGS. 2, 5, and 6 to an open state shown in FIG.

  The design of the substantially L-shaped lock / release lever 8 in the first embodiment can be changed to a member such as another shape of the lock / release button. In addition, the lock / release member can be installed near both the left and right sides of the printer unit 3.

FIG. 3 is a perspective view of the printer according to the first exemplary embodiment of the present invention in a state where the main body cover side is opened from the printer main body. FIG. 4 is a perspective view of the printer with the main body cover side closed with respect to the printer main body. FIG. 3 is a perspective view of a state where a cover is removed in FIG. 2. FIG. 4 is an enlarged side view of the vicinity of the movable shaft of the opening / closing arm, the platen portion mounting plate, and the platen portion mounting plate in FIG. 3. FIG. 3 is a front view of the printer with the main body cover side closed with respect to the printer main body. It is sectional drawing by line AA in FIG. It is typical sectional drawing of the principal part seen from the side of the 2nd prior art, (A) is a state in the middle of closing an upper cover with respect to an apparatus frame, (B) is the upper cover with respect to the apparatus frame. The closed state is shown respectively. It is a top view of the principal part which fractures | ruptures and shows a part of 2nd prior art, (A) is the state in which the same top cover was locked, (B) is the state in which the same top cover was unlocked, Show.

Explanation of symbols

1 Printer body 2 Printer base (printer mounting plate)
DESCRIPTION OF SYMBOLS 3 Printer part 4,5 Motor 6,7 Electric cable 8 Lock / release lever 8a Lock recessed part 11 Main body cover side 12 Rotating shaft 13 Opening / closing arm 13a Long hole 14 Movable shaft 15 Platen part mounting plate 15a, 15b Support part 16 Cover 16a , 16b Side guides 16c, 16d Upper surface guide 17 Platen part 17a, 17b Shaft 18, 19 Gear 20, 21 Intermediate gear P Paper path

Claims (6)

A printer main body, and a main body cover side rotatably attached to the printer main body;
The printer body includes a printer base, a printer unit attached to the printer base, and a lock / release member attached to the printer base,
The body cover side, an opening and closing arm mounted rotatably on said printer base, and the platen unit mounting plate that is provided separately from the said opening and closing arm, a platen unit mounted on the platen unit mounting plate, A cover attached to the opening and closing arm;
The platen part mounting plate is attached to the opening and closing arm in a state in which the platen part is movable in a direction in which the platen part can be engaged with the lock and release member.
An opening / closing mechanism for a printer, wherein when the main body cover side is closed with respect to the printer main body, the main body cover side is locked to the printer main body by engaging the platen portion with the lock / release member.   2. The platen part mounting plate is movably attached to the opening / closing arm by fitting a shaft fixed to the platen part mounting plate into a long hole formed in the opening / closing arm. The opening / closing mechanism of the printer described.   3. The printer opening / closing mechanism according to claim 2, wherein the elongated hole is a track-like hole.   2. The printer opening and closing mechanism according to claim 1, wherein the lock / release member is formed in a substantially L shape and has a lock recess.   5. The printer opening and closing mechanism according to claim 4, wherein the main body cover side is locked to the printer main body by engaging a shaft provided in the platen portion with the lock recess.   6. The printer opening and closing mechanism according to claim 5, wherein a power transmission gear is fixed to a shaft provided in the platen portion.

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